Food Bioscience
·
2024
·
IF 4.8
Lian Xia,Jia Zheng,Jian Su,Hongli Yang,Zhengmin Xie,Yue Tang,Yuangen Wu
Ethyl carbamate (EC) is a small compound produced and stored during fermentation processes from ethanol, urea, citrulline, and carbamoyl phosphate. EC is commonly found in fermented foods and alcoholic beverages. Prolonged exposure to EC can cause nervous system diseases and liver damage in human beings. EC lacks stable physicochemical properties, and the presence of numerous interfering substances in alcoholic beverages poses challenges for its detection. Herein, it is found that EC1-34 aptamer bound to EC can enhance the laccase-like activity of cubic Ag 2 O nanoparticles (NPs). Subsequently, Ag 2 O NPs are wrapped with EC1-34 aptamer to prepare recognition probes, which are immobilized on a carrier membrane. Thus, a portable paper-based sheet for EC detection in Chinese Baijiu is designed. The visual detection limit of the developed paper-based sheet for EC is 10 μg⋅L −1 , and shows an outstanding linear relationship within the range of 10–200 μg⋅L −1 . Moreover, this colorimetric paper-based sheet has a good practicality in various Chinese Baijiu samples. It is believed that such paper-based sheet can facilitate portable inspection for EC in Baijiu, and may also become a beneficial tool for monitoring EC molecules in other fermented foods.
研究领域:
食品科学
·
分析化学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
ELECTROANALYSIS
·
2016
·Vol. 29
·期 2
·481-488
·
IF 2.471
Zhiwei Zhang,Xiaoxia Lu,Yaping Tian,Nandi Zhou
An amperometric biosensor for ethyl carbamate (EC) was developed for the first time through the cascade reactions of urethanase and glutamate dehydrogenase (GLDH). Urethanase decomposes ethyl carbamate to produce ammonia, which converts to L-glutamate under the catalysis of GLDH in the presence of α-ketoglutarate and NADH. Then the change of NADH can be detected chronoamperometrically. The two enzymes were entrapped into chitosan/gelatine/γ-glycidoxy propyl trimethoxy silane sol-gel and immobilized on the surface of pyrolytic graphite electrode (PGE). The modified electrode was characterized by cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). Under the optimized conditions, the amperometric EC biosensor exhibits a linear detection range from 0.5 to 40 μM with a low detection limit of 5.30 nM. The biosensor was successfully used to detect EC in mimic Chinese rice wine samples, and satisfactory recovery and relative standard deviation were achieved.
研究领域:
分析化学
·
生物技术
·
食品科学
✓ 已验证
产品关联
DOI
高影响因子
FOOD CHEMISTRY
·
2022
·
IF 9.231
Wei Jia,Zibian Fan,An Du,Lin Shi
Ethyl carbamate (EC) is carcinogen occurring naturally in fermented foods, while the EC formation pattern in Feng-flavor Baijiu during Mare Nectaris storage and magnetic field treatment remains controversial. In this work, variation of EC in Mare Nectaris and magnetic field were investigated for the first time through ultra high performance liquid chromatography quadrupole-orbitrap high resolution mass spectrometry (UHPLC-Q-Orbitrap). Quantification results revealed that EC decreased significantly in the stage of 3–9 years and kept at 12.4 μg L −1 after 10 years of aging. Arginine succinate synthase (ASS) and urease were deemed as vital factors for EC decomposition. Degradation effetc of EC in 250 mT is simillar to that of EC in Baijiu stored in Mare Nectaris for 8 years. This is due to that aging process was accelerated by magnetic field and the content of total acid in Baijiu was increased, creating a favorable environment for decomposition of EC and urea.
研究领域:
食品科学
·
分子生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Energy Materials
·
2022
·
IF 6.959
Ming Zhou,Hongzhan Chen,Zehai Chen,Zehao Hu,Nan Wang,Yanshuo Jin,Xiang Yu,Hui Meng
Uncontrollable growth of zinc dendrites and byproducts has become the main factor which limits the life of zinc-ion batteries. Herein, we reported a nonionic surfactant, coconut diethanolamide (CDA), which can be applied as an electrolyte additive. It not only effectively suppresses zinc graft growth and promotes uniform growth of zinc dendrites but also efficiently inhibits the generation of side reactions and byproducts. When CDA is added to the electrolyte, the life of the battery has been significantly improved (1580 h). Compared with an electrolyte without CDA (100 h), its life has grown more than 10 times. CDA can adsorb on the surface of the zinc electrode to form a protective layer by its special molecular structure. Therefore, zinc ions will have a higher barrier for deposition, and there should be induced uniform deposition. Moreover, the Cu/Zn cell shows 98% average Coulomb efficiency in the electrolyte with CDA after about 620 h. In addition, after long-term cycles, the addition of CDA enables the MnO2/Zn cell to show 85% capacity retention and 98% average Coulomb efficiency. The electrolyte additives reported in this study will provide a more convenient and environmentally friendly way to effectively solve the problem of zinc branches.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING RESEARCH & DESIGN
·
2019
·
IF 3.073
Wei Chen,Jiujing Peng,Bin Du,Liangqian Fan,Hongbing Luo,Yanbo Lu,Keqin Feng,Huaili Zheng
In this work, a hydrophobically modified cationic polyacrylamide (CPAC) flocculant was polymerized by short-wave ultraviolet (UVC) initiation with acrylamide, acryloyloxyethyl trimethylammonium chloride, and coconut diethanolamide (CDEA) as monomers to enhance the destabilization and separation efficiency of emulsified oil and particles/colloids from metalworking fluids wastewater (MWFs). The parameters for flocculant polymerization were optimized, and the features of UVC-initiated polymerization were studied. Moreover, the structural and morphological characteristics of the polymers were explored, and the flocculation performance of CPAC in MWFs treatment was evaluated. The characterization results suggested that flocculants with a multilayer, loose-sheet morphology and intrinsic viscosity of 11.32 dL g −1 could be successfully polymerized by UVC-initiated polymerization. Compared with traditional UV, UVC irradiation initiation promoted the copolymerization of flocculants with a high monomer conversion rate and intrinsic viscosity. We observed the low dosage requirement and acid resistance of the flocculant synthesized by UVC-initiated polymerization, which produced the lowest residual turbidity, highest chemical oxygen demand, and most efficient oil removal during MWFs treatment among the samples studied. Besides charge neutralization and bridging effects, the adsorption effect between hydrophobic CDEA blocks and nonpolar oil/colloids facilitated the formation of microflocs and improved the flocculation efficiency of the flocculant.
研究领域:
环境科学
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
·
2022
·Vol. 331
·期 4
·1731-1740
·
IF 1.754
Kubota Masahiko,Wu Hao,Kim Seong-Yun
A N’-N’ -di-n-hexyl-thiodiglycolamide and 2,2’-[(2-ethylhexyl)imino]bis[ N,N -bis(2-ethylhexyl)acetamide] impregnated porous silica-based adsorbent was prepared for enhancing the adsorption of palladium ions from simulated high-level liquid waste. The adsorbent exhibited a relatively fast palladium response and selectivity without the use of additional modification reagents. Palladium ions were adsorbed over a wide nitric acid range of 0.6−5 M and a broad temperature range of 288−323 K. The uniform distribution of adsorbed palldium ions onto the study adsorbent was confirmed by PIXE. Successful recovery of more than 90% of the palladium ions was achieved using 0.1 M thiourea via separation by column experiments. Based on the obtained data, it is expected that the prepared adsorbent can be used for the practical separation of palladium ions from high-level liquid waste.
研究领域:
化学工程
·
核废物处理
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）